Ethereum swarm platform

1. "blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. The so-called consensus mechanism is a mathematical algorithm to establish trust and obtain rights and interests between different nodes in the blockchain system. "
I. the meaning of blockchain
in a narrow sense, blockchain is a kind of chained data structure composed of data blocks connected in sequence according to the time sequence, and it is a distributed account book that can not be tampered with and forged by means of cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing paradigm, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data
ENS is Ethereum domain name service, a distributed, open and extensible domain name system based on Ethereum. Some hash addresses used in Ethereum ecosystem are usually very long, such as Ethereum wallet address and swarm file hash address, while ENS domain name system is designed to provide users with short and easy to read domain names. Ens does not grant any trademark or declare any ownership. The domain name application of ENS is a completely decentralized process. The domain name is not obtained through purchase. You need to deposit a certain amount of ether coin in the corresponding registration contract as a deposit for at least one year. In order to avoid garbage and meaningless operation, the process of auctioning domain names includes locking deposit and destroying penalty, trying to ensure that the domain name will be registered by the actual user. The ether money spent in the process will eventually be returned to the successful bidder and destroyed in breach of contract. It will not generate income and is completely non-profit.

2.

DAPP is the abbreviation of Chinese distributed app for decentralized application
a DAPP has background code running in a distributed peer-to-peer network. The background code of traditional app is running on the centralized server
the front-end code of a DAPP can be developed by any language, just like the traditional app. In addition, DAPP's front-end code can be hosted in distributed storage services, such as swarm or IPFs
If an application = front end + back end, because Ethereum contract is composed of code running in Ethereum distributed point-to-point network, distributed application = front end + contract
the picture shows a DAPP architecture:

app we all know that it is a client application, which is the abbreviation of application. DAPP is d + app, and D is the first letter of English word decentralization. Chinese word translation is decentralization, that is DAPP is decentralized application. This is to understand the concept literally. To form a clear, accurate and necessary concept in the brain, we need to understand DAPP in depth
compared with app, the biggest difference between them is centralization and decentralization. App needs money first, so it needs financing first; Then there will be more people, so we will develop and operate after recruiting all the people. DAPP is the proct of inheriting traditional app and combining the characteristics of blockchain, which is more like crowdfunding mode, sharing mode and decentralization mode

3. I know whether Ethernet is the same thing. It's just a name of network communication materials. It's the same thing as broadband Internet. It's only different in units and categories. It's essentially an attribute of physical substances. That's all I know. And recently, I won't give a reward.

4. Swarm is a distributed storage platform and content distribution service, and a local service layer of Ethereum Web3 stack. The main goal of swarm is to provide enough decentralized and repetitive storage for Ethereum public records, especially DAPP code and data and block data. From an economic point of view, it will encourage some participants to concentrate their storage and bandwidth resources to provide the above services for other network members.

5. Dig north, use the compass to find the north, remember to dig in the bedrock layer, ask to adopt a little (# 3665&# 8226;&# 768;&# 12610;&# 8226;&# 769;)&# 1608;&# 10023;

6. Install multi world plug-in and Stargate plug-in

7. Normal driving time: 4.5 hours
ticket price: Alts 95 yuan / person, children 55 yuan / person
route: Putuo Long Distance Passenger Transport Center (Chengbei station) → Lincheng bus terminal → dinghaigang passenger station (dinghainan station) → Hangzhou Wushan Square → Huanglong Sports Center

take me, thank you

8. I remember it was the earliest bus at 6:40, every 30 minutes, and the last bus at 18:40.

9. The first day: take a bus from Hangzhou east bus station to Shenjiamen (6:30-18:50, a total of 15 buses, 95 yuan / person, estimated travel time of 5 hours), transfer to a minibus 2 yuan / person to Banshengdong wharf, take a speedboat 19.5 yuan / person to Putuo Mountain. After arriving on the island, first play Xitian scenic spot, and then go to Puji temple, The next day: Fayu temple, qianbusha, refuse to go to guanyinyuan, Nanhai Guanyin, you can go back to your home at noon.
the fee is as follows:
transportation fee: 250 yuan / person (round-trip fare, get on the island, Round trip speedboat)
accommodation: 150 yuan / person (not the price ring the golden week)
admission: 160 yuan / person (200 yuan / person from the first to the third day of the Lunar New Year)
it is recommended that you take a two-day tour of Putuo Mountain by the travel agency, and the price will be cheaper than this one (you can counter-offer on the market price).
in addition, the cross sea bridge starts from Jiaxing in the north and ends at Cixi in the south